Raker gage and jointer.



No. 863,377. PATENTED AUG. 18, 1907. J. G. GEHRMAN.

RAKER GAGE AND JOINTER.

APPLICATION PILED'MAY 9, 1906.

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JACOB O. GEHRMAN, OF FRANCES, WASHINGTON.

BAKER GAGE AND JOINTER.

Specification of Letters Patent.

Patented Aug. 13, 1907.

Application filed May 9,1906. Serial 316,015.

To all whom itmay concern:

Be it known that I, JACOB O. GEHRMAN, a citizen of the United States ofAmerica, residing at Frances, in the county of Pacific and State ofWashington, have invented certain new and useful Improvements in BakerGages and Jointers, of which the following is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to improvements in raker gages and jointers andconsists of certain novel devices and constructions whereby the cuttingteeth of a saw may be jointed and the raker teeth gaged for jointing.

My invention is illustrated in the accompanying drawing in which Figure1 is a perspective view of my device mounted on a saw to gage the rakersthereof. Fig. 2 is side elevation thereof. Fig. 3 is a crosssection onthe line 33 in Fig 2. Fig. 4 is a plan of my device and Fig. 5 is an endview showing it applied to a saw to joint the teeth thereof.

Similar numerals of reference refer to similar parts throughout theseveral views.

My device consists of a piece of stiff metal bent so as to straddle thesaw with its sides 1 and 2 and having a large slot 3 cut into its sidesbetween its ends and being bent at the junction of the two sides 1 and 2into the form of an open-ended oblong constituting a horizontal pocketon each side of the slot 3, and further the side 2 is bent at its lowerend to form a shelf on which a file 5 is secured as hereinafterdescribed. In each of the oblongs or pockets is a hardened body,preferably formed of glass, which body 4 constitutes filling means forthe pockets or oblongs. Within the slot 3 above mentioned are adjustablysecured, to each of the sides 1 and 2, the raker gages 6, shaped in theform in which the rakers of the saw should be formed, and their tops arefixed lower than the hardened surface 4 the desired amount that therakers should be lower than the tops or points of the cutting teeth. Theside 2 of my device is provided with two lugs 7 extending outwardtherefrom a distance practically equal to the distance which the topbend of the side 2, which incloses the hardened surface 4, extends fromthe side 2 so that (Fig. 5) if the device is used to joint the teeth thefile 5 secured to the side 2 will be practically at right angles to theplane of the saw.

The shelf to which the file 5 is secured extends out horizontally fromthe side 2 and is provided with two end clips 8 adapted to fit over theouter corners of the file and with a central inner clip 9 adapted to fitover the inner side of the file and it is further provided with a setscrew 10 on its lower side adapted to press the file 5 upward againstthe clips 8 and 9 thus holding the file firmly in position.

My device is used to gage and joint the rakers in the positions shown inFigs. 1, 2 and 3 in which it straddles a saw, being supported thereon bythe tips of the cutting teeth engaging the undcr surface of the glass l,and is so arranged that the raker of the saw will come opposite theraker gages 6 on each side thereof so that any deviation of the rakerfrom its proper position relative to the cutting teeth will beimmediately noted and can be corrected in any of the usual ways. Each ofthe sides 1 and 2, is provided with a vertical, outwardly-bulged portion6, within which is slidably mounted one of the raker gages. Suitablefastening means is positioned in the elongated slot 6 of each bulgedportion 6, for securing the raker gage to the bulged portion.

My device is further used to joint the cutting teeth as shown in Fig. 5in which it is reversed and placed to one side of the saw and the longerteeth are brought down to the level of the shorter teeth by the file 5passing over them.

Having described my invention, what I claim is:

within said outwardlybulged portions, and means posi-- tioned withinsaid slots and engaging said gages and securing the same to theoutwardlybulged portions.

In testimony whereof I afiix my signature in presence of two witnesses.

JACOB C. GEHRMAN.

Witnesses P. L. STANLEY, J. F. KATHRINER.

